firs things first u said u want a tune? get the exhaust and cai (cold air intake) and then get the tune.
1 before you start buffing and polishing wash your car and clay bar it you can get clay bar at any auto parts.
2 now for the swirls and scratches blemishes u need a d/a buffer i use a griots garage d/a buffer
3 then a compounding buffing pad and cutting compound i use meguires swirl remover.
4 then polish the surface with a polishing pad and polish i also use meguires for that.
and last is a paint sealant i use griots paint sealant i get really good results with that stuff and that is a good starting point for you.. im sure some other guys will chime in!!
look up mike phillips on youtube watch the vids he shows u everything u need to know..
this is the buffer i use
this is a good set of what u need for pads..
this is what i use for compound
heres the polish